Probing the Corona of AN Active Solar-Type Star

Details Probing the Corona of AN Active Solar-Type Star Probing the Corona of AN Active Solar-Type Star

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1149h&link_type=abstract

Chandra Proposal ID #04200865

Physics

Chandra Proposal Id #04200865

Scientific paper

Observations of active cool stars indicate that flux emerges at high latitudes. We will use LETG spectra of AB Dor (K0V) to look for rotational modulation in line profiles and thus to evaluate the locations of emitting regions. Time-constrained observations are requested in order to obtain contemporaneous surface magnetic field maps. These maps will be extrapolated to produce a 3-D coronal field model for the star. The 3-D model can be used to synthesise Doppler-shifted line profiles as the star rotates in a physically realistic way that includes self-eclipse effects. This will enable us to probe the relationship between X-ray emitting structures in the corona and magnetic structures that can be mapped in detail at the photosphere.

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